feat: support firebase auth.

[appleboy]

fix #82

[codecov-io]

Codecov Report

Merging #83 into master will increase coverage by 0.25%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master      #83      +/-   ##
==========================================
+ Coverage    25.7%   25.95%   +0.25%     
==========================================
  Files          15       15              
  Lines         607      601       -6     
==========================================
  Hits          156      156              
+ Misses        437      431       -6     
  Partials       14       14

Impacted Files	Coverage Δ
router/router.go	17.72% <0%> (+1.25%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7daf376...ecd33c1. Read the comment docs.